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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. 1. visual evaluation - 2. scrotal circumference - 3. penis and prepuce observation - 4. rectal palpation - 5. libido test - 6. semen evaluation






2. (FSH) causes egg to mature in females






3. 1. to eliminate breeding the females at an early age - 2. makes animals less lean and provides a better cut for the market






4. Microscopic - make sure not sterile - very few bulls are actually tested






5. 24 hours before end of estrus cycle






6. Larger the cow - more milk is produced; smaller the cow - less milk is produced






7. 30-38 hours after estrus cycle begins






8. (male) pushes the testes upward toward the body for warmth or protection






9. Scar tissue plugs up chambers of udder






10. Duct through penis that carries sperm and urine






11. Front feet and head first. (except for hogs and dogs)






12. Castration tool which clamps down on the vans deferens. causes the sperm to not reach the penis to be ejaculated






13. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






14. Head - neck - mid-piece - tail. genetic material - has an enzyme covering that allows it to penetrate the egg






15. Produce testosterone. located between the seminiferous tubules






16. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm






17. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






18. Earlier you castrate a male - the easier it is on the animal. the longer you wait - death rates increase






19. Boars and stallions-> deliver semen directly into the cervix. bulls and rams-> deliver semen into the vagina.






20. Milk made by mother which includes antibodies for the calf. MUST be given to the calf within the first 24 hrs of life. also provides calf with energy stores. effectiveness lasts from 4-8 months of age.






21. Contains and regulates the temp of the testes for sperm production






22. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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23. 45-60 days after breeding; re-breed as required






24. 19-23 (21) days






25. Provide nourishment for the developing sperm






26. Actual heat cycle (period)






27. Help to signal hormone levels which we need both in the brain right next to each other.






28. Larger the cow - more milk is produced; smaller the cow - less milk is produced






29. (FSH) helps to regulate puberty - needed every day - stimulates the sertoli cells to produce nutrients for the sperm






30. Largest dairy cow - largest udder - highly vascular - eat 40-50% dry matter (eat alot) - most total butterfat






31. Organ of copulation - provides passageway for semen and urine - muscular organ characterized especially by its spongy - erectile tissue that fills with blood






32. Male on one pin and female on other side






33. Sperm is produced here






34. Milk ~305 days - dry 60 days prior to calving






35. (LH) stimulates the Leydig cells to produce testosterone






36. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






37. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






38. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge






39. Standing to be mounted (last one able to notice); mounting other animals; social behavior-restless - gregarious - activity - vocalizing; frequent urination; mucous discharge






40. The more stressed out the male is - the less sperm he is going to produce






41. Cleans and lubricates the urethra ahead of the sperm. (if not - the urine in the urethra has a high salt content and would cause sperm to rupture and die)






42. (male) definition: duct located outside of the testes. 3 parts: head - body - tail. 4 Functions:concentrate sperm - store sperm - transport sperm - site of sperm maturation. entire process takes ~40-60 days






43. When are dairy cattle dehorned?






44. Actual heat cycle (period)






45. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






46. Prevent the cow from getting an infection from the calve






47. Examine accessory glands - also to know how big the pelvic opening is->heritable->relates to how much dystocia that bull's daughter has






48. Start of the reproductive tract for the female. located outside of the body






49. Days which have decreasing daylight hours

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50. Sperm production